Yes, AROUND is a Scrabble word!

Letter values in Scrabble US: A 1, R 1, O 1, U 1, N 1, D 2.

Is it a valid word?

AROUND is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

in the area or vicinity
by a circular or circuitous route
used of movement to or among many different places or in no particular direction
in a circle or circular motion
(of quantities) imprecise but fairly close to correct
in or to a reversed position or direction
to a particular destination either specified or understood
all around or on all sides
in circumference
from beginning to end; throughout

Also: close to, just about, more or less, or so.